package cn.tedu.sp06.filter;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import com.netflix.zuul.exception.ZuulException;
import org.apache.commons.lang3.StringUtils;
import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;

@Component
public class AccessFilter extends ZuulFilter {
    @Override
    public String filterType() {
        return FilterConstants.PRE_TYPE;
    }

    @Override
    public int filterOrder() {
        return 6;
    }

    @Override
    public boolean shouldFilter() {
        RequestContext ctx = RequestContext.getCurrentContext();
        String serverId = (String) ctx.get(FilterConstants.SERVICE_ID_KEY);
        return "item-service".equals(serverId);
    }

    @Override
    public Object run() throws ZuulException {

        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();
        String token = request.getParameter("token");
        //古国没有token，阻止继续访问，直接返回响应
        if(StringUtils.isBlank(token)){
            //阻止继续访问
            ctx.setSendZuulResponse(false);
            //直接返回响应
            ctx.addZuulRequestHeader("Content-Type","text/plain");
            ctx.setResponseBody("未登录！");
        }
        return null;
    }
}
